In JavaScript, first-class functions refer to functions that are treated as first-class citizens. This means that functions are treated just like any other value in the language, such as strings, numbers, or objects. They can be assigned to variables, passed as arguments to other functions, returned as values from other functions, and even be stored in data structures like arrays or objects.
Assigning functions to variables:
You can assign a function to a variable just like you would with any other value:
Passing functions as arguments:
You can pass functions as arguments to other functions:
Returning functions from functions:
A function can return another function:
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